EPA To Exercise Residual Designation Authority in Charles, Neponset, and Mystic River Watersheds
EPA Region 1 announced today that they will exercise their residual designation authority under the Clean Water Act in the Charles, Mystic, and Neponset river watersheds. Certain commercial, industrial, and institutional properties with one or more acres of impervious area will be required to obtain coverage under an EPA Clean Water Act permit. Once permits are issued, property owners will be required to take steps to reduce pollutants in stormwater.
EPA anticipates issuing one or more general permits specifying the activities that property owners must implement to reduce stormwater pollution from their properties. Privately owned commercial, industrial, and institutional properties with 1-acre or greater impervious cover will need to seek coverage under one of these permits (or an individual permit if they prefer) and take the actions spelled out in the permits. "Institutional" includes but is not limited to medical and private higher education institutions. Housing properties, regardless of whether they are single or multi-family, will not be impacted.
The general permits will be released in draft form for public comment in the future; EPA has not established a specific timeline for publication. Public comments on this determination will also be accepted at that time, per EPA regulations, before the draft permits are finalized. No property owner is subject to additional requirements until such time as the permits are finalized and take effect, and there will be opportunity for stakeholder comment on the draft permits.
495/MetroWest Partnership communities that are fully or partially located within the Charles River watershed are Ashland, Bellingham, Franklin, Holliston, Hopedale, Hopkinton, Medfield, Medway, Milford, Millis, Natick, Norfolk, Sherborn, Wayland, and Wrentham. Portions of Foxborough and Medfield are located in the Neponset River watershed.
Additional Information:
The 495/MetroWest Partnership has requested EPA staff present to our Water Resources Committee on this topic; an announcement regarding a stakeholder briefing is forthcoming.
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